Low-complexity iterative demodulation for noncoherent coded transmission over Ricean-fading channels
نویسندگان
چکیده
| Power and bandwidth eÆcient noncoherent transmission over frequency non-selective Ricean fading channels is studied. We propose a remarkably low-complexity receiver structure which is very well suited to mobile communication scenarios with time-variant and nonstationary transmission channels. Applying bit-interleaved coded modulation with standard convolutional codes, substantial gains of several dB in power eÆciency compared to conventional di erential detection are achieved. To obtain the novel noncoherent reception scheme, ideas of iterative decoding with hard-decision feedback and prediction-based branch metric calculation are combined and extended. Furthermore, the incorporation of combined phase and amplitude modulation for high bandwidth eÆciency is focussed on. The theoretical analysis of both the convergence and the achievable performance of iterative decoding are given by evaluating the corresponding prediction-error variance and the associated cuto rate, respectively. The results from information theory are well con rmed by simulation results presented for di erent channel scenarios.
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عنوان ژورنال:
- IEEE Trans. Vehicular Technology
دوره 50 شماره
صفحات -
تاریخ انتشار 2001